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Hi Mark, Thank you very much for your reply. It really makes sense. Great solution. One more question that I couldn't find neither in chip's datasheet nor Teensy's website: is there a limit of how much total current we can draw from all the I/O...

Any updates on this topic? I am using Teensy 4.1 with solid state relays (7 of them).Here is the datasheet. I tried one of the relays with power supply aside from Teensy just to see how much current it draws. If I give 3.3 VDC from my power...